Microsoft announced a definitive agreement to buy Skype for $8.5 billion. The agreement has been approved by the boards of directors of both Microsoft and Skype.

The acquisition will increase the accessibility of real-time video and voice communications, bringing benefits to both consumers and enterprise users and generating significant new business and revenue opportunities. The combination will extend Skype’s world-class brand and the reach of its networked platform, while enhancing Microsoft’s existing portfolio of real-time communications products and services.

Skype will support Microsoft devices like Xbox and Kinect, Windows Phone and a wide array of Windows devices, and Microsoft will connect Skype users with Lync, Outlook, Xbox Live and other communities. Microsoft will continue to invest in and support Skype clients on non-Microsoft platforms.

Skype will become a new business division within Microsoft, and Skype CEO Tony Bates will assume the title of president of the Microsoft Skype Division, reporting directly to Ballmer.